I'm on version 4.2.2.123 with Bell Canada (8830) and have paired it with the sony street style headphones (DR-BT21G). The sound is awesome. Also have the ability to skip to the next song, ect. Great battery life on both devices and I can take calls and use voice dialing using the same head phones. Stay away from the BlueAnt X5 because it sounds terrible and has poor build quality.